Fig. 8
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Comparison of methylene-to-methyl (CH2/CH3) intensity peak ratios for Ryugu bulk sample measurements (this work) with measurements from the literature for diffuse ISM observations (Sandford et al. 1991; Pendleton et al. 1994; Dartois et al. 2007; Godard et al. 2012), Stardust samples (comet 81P/Wild2, Keller et al. 2006), IDPs (Flynn et al. 2003), and meteorites bulk and IOM samples (Alexander et al. 2014; Briani et al. 2013; Dionnet et al. 2018; Kebukawa et al. 2010, 2011, 2019; Kerraouch et al. 2022; Merouane et al. 2012; Orthous-Daunay 2011, 2013; Quirico et al. 2018; Yesiltas et al. 2014, 2015, 2022; Yesiltas & Kebukawa 2016).
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